VEHICLE PROXIMITY NOTIFICATION SYSTEM Speaker Circuit

DESCRIPTION

The vehicle approaching speaker controller operates (e.g., sounds) the vehicle approaching speaker assembly during EV driving mode. The vehicle approaching speaker controller changes the pitch of the sound emitted from the speaker according to vehicle speed when the vehicle is being driven in EV driving mode.

WIRING DIAGRAM

A000UMME27
*a SP+
*b SP-
*c Vehicle Approaching Speaker Assembly
*d Vehicle Approaching Speaker Controller

CAUTION / NOTICE / HINT

Note

Check the vehicle approaching speaker assembly sound operation before performing the following inspection procedure. If the vehicle approaching speaker assembly operates normally, proceed to the next suspected area shown in the problem symptoms table.

Click here

PROCEDURE


  1. CHECK VEHICLE APPROACHING SPEAKER CONTROLLER (OUTPUT WAVEFORM)


    1. Using an oscilloscope, check the waveform.

      A000UQIC13
      *a

      Front view of wire harness connector

      (to Vehicle Approaching Speaker Assembly)

      		 - -

      1. Disconnect the A100 vehicle approaching speaker assembly connector.

      2. Check the signal waveform according to the condition(s) in the table below.

        Measurement Condition
        Item Condition
        Terminal No. (Symbol) A100-2 (+) - A100-1 (-)
        Tool setting 1 V/DIV., 200 ms./DIV.
        Condition Speaker operating*

        *: Use the operation check procedure to operate the speaker.

        Click here

        OK
        The waveform is displayed as shown in the illustration.
        Result
        Proceed to
        OK
        NG

    OK

    REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (VEHICLE APPROACHING SPEAKER CONTROLLER - VEHICLE APPROACHING SPEAKER ASSEMBLY)


    1. Disconnect the L201 vehicle approaching speaker controller connector.

    2. Disconnect the A100 vehicle approaching speaker assembly connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      L201-3 (SP+) - A100-2 (+) Always Below 1 Ω
      L201-8 (SP-) - A100-1 (-) Always Below 1 Ω
      L201-3 (SP+) - Body ground Always 10 kΩ or higher
      L201-8 (SP-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR